The Crown of Fire

This concluding book in bestselling author Tony Abbott's critically acclaimed middle grade adventure series is a mile-a-minute thrill ride. Perfect for fans of Rick Riordan and Ridley Pearson."Upon my life, I will." Across the centuries, every Guardian who has protected one of the twelve relics of the Copernicus legacy has taken this vow. But never have the consequences of the promise been more profound. The secret network of the great astronomer's spies is the target of an assassination plot, led by the despicable Galina Krause. And now the Kaplans are more alone than ever before as they race from France to Antarctica against a deadly ticking clock.There is not much time left for Wade, Darrell, Lily, and Becca to find the remaining relics and defeat their enemies. But are they willing to risk the life of one of their own in order to save the world?A Desperate Race Against Time: With their enemies closing in, the Kaplans must travel from France to the icy wastes of Antarctica to find the last of the Copernicus relics.An Ancient Historical Mystery: The secrets of Nicolaus Copernicus and a powerful time machine are the prize in a centuries-old war between Guardians and a ruthless Teutonic Order.Found Family Under Fire: Wade, Darrell, Lily, and Becca are more alone than ever. To save the world, they must confront the terrible possibility of sacrificing one of their own.High-Stakes Spy Action: An assassination plot led by the deadly Galina Krause targets the remaining Guardians, forcing the kids to outwit a network of spies at every turn.